Well as confusing as all that is, I ended up getting this vehicle Saturday. I couldn't tell by looking underneath if the rear diff had the ELSD or not, no real obvious electric motor, looks the same as any other differential to me... but the startup screen on the dash says "Quadradrive" so that's good enough for me.
Previously owned jeeps:
'06 Grand Cherokee Limited w/4.7L V8 & QD2
'98 Grand Cherokee Limited w/5.2L V8 & Quadra Trac - sold at 230k miles